Vulnerability · Published Nov 7, 2026 · Assigned by Wordfence

CVE-2026-120739Optimole <= 4.2.18 - Unauthenticated Stored Cross-Site Scripting via Page Profiler srcset Descriptor

High 7.2

In plain English

A high-severity cross-site scripting in Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization from optimole. There are no confirmed reports of exploitation so far.

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)–no EPSS score yet

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

The Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 's (missing_srcsets[*][*].s)' parameter in all versions up to, and including, 4.2.18 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The HMAC signature required to pass the REST endpoint's authorization check is published in plaintext to unauthenticated visitors inside the inline optimoleDataOptimizer JavaScript object on any page with an incomplete profile, making the effective authentication barrier nonexistent.

Affected products (as reported)

Vendor	Product	Versions
optimole	Optimole – Optimize Images \| Convert WebP & AVIF \| CDN & Lazy Load \| Image Optimization	0 – through 4.2.18

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References